<!doctype html>
<html>
<head>
<meta charset='UTF-8'><meta name='viewport' content='width=device-width initial-scale=1'>
<link rel="stylesheet" href="./css/bootstrap.min.css">  
<link rel="icon" href="./img/tx1.jpg" type="image/x-icon">
<link rel="stylesheet" href="./css/index.css">
<title>知否</title><link href='https://fonts.loli.net/css?family=Open+Sans:400italic,700italic,700,400&subset=latin,latin-ext' rel='stylesheet' type='text/css' /><style type='text/css'>html {overflow-x: initial !important;}:root { --bg-color:#ffffff; --text-color:#333333; --select-text-bg-color:#B5D6FC; --select-text-font-color:auto; --monospace:"Lucida Console",Consolas,"Courier",monospace; }
html { font-size: 14px; background-color: var(--bg-color); color: var(--text-color); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; }
body { margin: 0px; padding: 0px; height: auto; bottom: 0px; top: 0px; left: 0px; right: 0px; font-size: 1rem; line-height: 1.42857; overflow-x: hidden; background: inherit; tab-size: 4; }
iframe { margin: auto; }
a.url { word-break: break-all; }
a:active, a:hover { outline: 0px; }
.in-text-selection, ::selection { text-shadow: none; background: var(--select-text-bg-color); color: var(--select-text-font-color); }
#write { margin: 0px auto; height: auto; width: inherit; word-break: normal; overflow-wrap: break-word; position: relative; white-space: normal; overflow-x: visible; padding-top: 40px; }
#write.first-line-indent p { text-indent: 2em; }
#write.first-line-indent li p, #write.first-line-indent p * { text-indent: 0px; }
#write.first-line-indent li { margin-left: 2em; }
.for-image #write { padding-left: 8px; padding-right: 8px; }
body.typora-export { padding-left: 30px; padding-right: 30px; }
.typora-export .footnote-line, .typora-export li, .typora-export p { white-space: pre-wrap; }
@media screen and (max-width: 500px) {
  body.typora-export { padding-left: 0px; padding-right: 0px; }
  #write { padding-left: 20px; padding-right: 20px; }
  .CodeMirror-sizer { margin-left: 0px !important; }
  .CodeMirror-gutters { display: none !important; }
}
#write li > figure:last-child { margin-bottom: 0.5rem; }
#write ol, #write ul { position: relative; }
img { max-width: 100%; vertical-align: middle; image-orientation: from-image; }
button, input, select, textarea { color: inherit; font: inherit; }
input[type="checkbox"], input[type="radio"] { line-height: normal; padding: 0px; }
*, ::after, ::before { box-sizing: border-box; }
#write h1, #write h2, #write h3, #write h4, #write h5, #write h6, #write p, #write pre { width: inherit; }
#write h1, #write h2, #write h3, #write h4, #write h5, #write h6, #write p { position: relative; }
p { line-height: inherit; }
h1, h2, h3, h4, h5, h6 { break-after: avoid-page; break-inside: avoid; orphans: 4; }
p { orphans: 4; }
h1 { font-size: 2rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.6rem; }
h4 { font-size: 1.4rem; }
h5 { font-size: 1.2rem; }
h6 { font-size: 1rem; }
.md-math-block, .md-rawblock, h1, h2, h3, h4, h5, h6, p { margin-top: 1rem; margin-bottom: 1rem; }
.hidden { display: none; }
.md-blockmeta { color: rgb(204, 204, 204); font-weight: 700; font-style: italic; }
a { cursor: pointer; }
sup.md-footnote { padding: 2px 4px; background-color: rgba(238, 238, 238, 0.7); color: rgb(85, 85, 85); border-radius: 4px; cursor: pointer; }
sup.md-footnote a, sup.md-footnote a:hover { color: inherit; text-transform: inherit; text-decoration: inherit; }
#write input[type="checkbox"] { cursor: pointer; width: inherit; height: inherit; }
figure { overflow-x: auto; margin: 1.2em 0px; max-width: calc(100% + 16px); padding: 0px; }
figure > table { margin: 0px; }
tr { break-inside: avoid; break-after: auto; }
thead { display: table-header-group; }
table { border-collapse: collapse; border-spacing: 0px; width: 100%; overflow: auto; break-inside: auto; text-align: left; }
table.md-table td { min-width: 32px; }
.CodeMirror-gutters { border-right: 0px; background-color: inherit; }
.CodeMirror-linenumber { user-select: none; }
.CodeMirror { text-align: left; }
.CodeMirror-placeholder { opacity: 0.3; }
.CodeMirror pre { padding: 0px 4px; }
.CodeMirror-lines { padding: 0px; }
div.hr:focus { cursor: none; }
#write pre { white-space: pre-wrap; }
#write.fences-no-line-wrapping pre { white-space: pre; }
#write pre.ty-contain-cm { white-space: normal; }
.CodeMirror-gutters { margin-right: 4px; }
.md-fences { font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; overflow: visible; white-space: pre; background: inherit; position: relative !important; }
.md-diagram-panel { width: 100%; margin-top: 10px; text-align: center; padding-top: 0px; padding-bottom: 8px; overflow-x: auto; }
#write .md-fences.mock-cm { white-space: pre-wrap; }
.md-fences.md-fences-with-lineno { padding-left: 0px; }
#write.fences-no-line-wrapping .md-fences.mock-cm { white-space: pre; overflow-x: auto; }
.md-fences.mock-cm.md-fences-with-lineno { padding-left: 8px; }
.CodeMirror-line, twitterwidget { break-inside: avoid; }
.footnotes { opacity: 0.8; font-size: 0.9rem; margin-top: 1em; margin-bottom: 1em; }
.footnotes + .footnotes { margin-top: 0px; }
.md-reset { margin: 0px; padding: 0px; border: 0px; outline: 0px; vertical-align: top; background: 0px 0px; text-decoration: none; text-shadow: none; float: none; position: static; width: auto; height: auto; white-space: nowrap; cursor: inherit; -webkit-tap-highlight-color: transparent; line-height: normal; font-weight: 400; text-align: left; box-sizing: content-box; direction: ltr; }
li div { padding-top: 0px; }
blockquote { margin: 1rem 0px; }
li .mathjax-block, li p { margin: 0.5rem 0px; }
li { margin: 0px; position: relative; }
blockquote > :last-child { margin-bottom: 0px; }
blockquote > :first-child, li > :first-child { margin-top: 0px; }
.footnotes-area { color: rgb(136, 136, 136); margin-top: 0.714rem; padding-bottom: 0.143rem; white-space: normal; }
#write .footnote-line { white-space: pre-wrap; }
@media print {
  body, html { border: 1px solid transparent; height: 99%; break-after: avoid; break-before: avoid; font-variant-ligatures: no-common-ligatures; }
  #write { margin-top: 0px; padding-top: 0px; border-color: transparent !important; }
  .typora-export * { -webkit-print-color-adjust: exact; }
  html.blink-to-pdf { font-size: 13px; }
  .typora-export #write { padding-left: 32px; padding-right: 32px; padding-bottom: 0px; break-after: avoid; }
  .typora-export #write::after { height: 0px; }
  .is-mac table { break-inside: avoid; }
}
.footnote-line { margin-top: 0.714em; font-size: 0.7em; }
a img, img a { cursor: pointer; }
pre.md-meta-block { font-size: 0.8rem; min-height: 0.8rem; white-space: pre-wrap; background: rgb(204, 204, 204); display: block; overflow-x: hidden; }
p > .md-image:only-child:not(.md-img-error) img, p > img:only-child { display: block; margin: auto; }
#write.first-line-indent p > .md-image:only-child:not(.md-img-error) img { left: -2em; position: relative; }
p > .md-image:only-child { display: inline-block; width: 100%; }
#write .MathJax_Display { margin: 0.8em 0px 0px; }
.md-math-block { width: 100%; }
.md-math-block:not(:empty)::after { display: none; }
[contenteditable="true"]:active, [contenteditable="true"]:focus, [contenteditable="false"]:active, [contenteditable="false"]:focus { outline: 0px; box-shadow: none; }
.md-task-list-item { position: relative; list-style-type: none; }
.task-list-item.md-task-list-item { padding-left: 0px; }
.md-task-list-item > input { position: absolute; top: 0px; left: 0px; margin-left: -1.2em; margin-top: calc(1em - 10px); border: none; }
.math { font-size: 1rem; }
.md-toc { min-height: 3.58rem; position: relative; font-size: 0.9rem; border-radius: 10px; }
.md-toc-content { position: relative; margin-left: 0px; }
.md-toc-content::after, .md-toc::after { display: none; }
.md-toc-item { display: block; color: rgb(65, 131, 196); }
.md-toc-item a { text-decoration: none; }
.md-toc-inner:hover { text-decoration: underline; }
.md-toc-inner { display: inline-block; cursor: pointer; }
.md-toc-h1 .md-toc-inner { margin-left: 0px; font-weight: 700; }
.md-toc-h2 .md-toc-inner { margin-left: 2em; }
.md-toc-h3 .md-toc-inner { margin-left: 4em; }
.md-toc-h4 .md-toc-inner { margin-left: 6em; }
.md-toc-h5 .md-toc-inner { margin-left: 8em; }
.md-toc-h6 .md-toc-inner { margin-left: 10em; }
@media screen and (max-width: 48em) {
  .md-toc-h3 .md-toc-inner { margin-left: 3.5em; }
  .md-toc-h4 .md-toc-inner { margin-left: 5em; }
  .md-toc-h5 .md-toc-inner { margin-left: 6.5em; }
  .md-toc-h6 .md-toc-inner { margin-left: 8em; }
}
a.md-toc-inner { font-size: inherit; font-style: inherit; font-weight: inherit; line-height: inherit; }
.footnote-line a:not(.reversefootnote) { color: inherit; }
.md-attr { display: none; }
.md-fn-count::after { content: "."; }
code, pre, samp, tt { font-family: var(--monospace); }
kbd { margin: 0px 0.1em; padding: 0.1em 0.6em; font-size: 0.8em; color: rgb(36, 39, 41); background: rgb(255, 255, 255); border: 1px solid rgb(173, 179, 185); border-radius: 3px; box-shadow: rgba(12, 13, 14, 0.2) 0px 1px 0px, rgb(255, 255, 255) 0px 0px 0px 2px inset; white-space: nowrap; vertical-align: middle; }
.md-comment { color: rgb(162, 127, 3); opacity: 0.8; font-family: var(--monospace); }
code { text-align: left; vertical-align: initial; }
a.md-print-anchor { white-space: pre !important; border-width: initial !important; border-style: none !important; border-color: initial !important; display: inline-block !important; position: absolute !important; width: 1px !important; right: 0px !important; outline: 0px !important; background: 0px 0px !important; text-decoration: initial !important; text-shadow: initial !important; }
.md-inline-math .MathJax_SVG .noError { display: none !important; }
.html-for-mac .inline-math-svg .MathJax_SVG { vertical-align: 0.2px; }
.md-math-block .MathJax_SVG_Display { text-align: center; margin: 0px; position: relative; text-indent: 0px; max-width: none; max-height: none; min-height: 0px; min-width: 100%; width: auto; overflow-y: hidden; display: block !important; }
.MathJax_SVG_Display, .md-inline-math .MathJax_SVG_Display { width: auto; margin: inherit; display: inline-block !important; }
.MathJax_SVG .MJX-monospace { font-family: var(--monospace); }
.MathJax_SVG .MJX-sans-serif { font-family: sans-serif; }
.MathJax_SVG { display: inline; font-style: normal; font-weight: 400; line-height: normal; zoom: 90%; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; }
.MathJax_SVG * { transition: none 0s ease 0s; }
.MathJax_SVG_Display svg { vertical-align: middle !important; margin-bottom: 0px !important; margin-top: 0px !important; }
.os-windows.monocolor-emoji .md-emoji { font-family: "Segoe UI Symbol", sans-serif; }
.md-diagram-panel > svg { max-width: 100%; }
[lang="flow"] svg, [lang="mermaid"] svg { max-width: 100%; height: auto; }
[lang="mermaid"] .node text { font-size: 1rem; }
table tr th { border-bottom: 0px; }
video { max-width: 100%; display: block; margin: 0px auto; }
iframe { max-width: 100%; width: 100%; border: none; }
.highlight td, .highlight tr { border: 0px; }
svg[id^="mermaidChart"] { line-height: 1em; }
mark { background: rgb(255, 255, 0); color: rgb(0, 0, 0); }
.md-html-inline .md-plain, .md-html-inline strong, mark .md-inline-math, mark strong { color: inherit; }
mark .md-meta { color: rgb(0, 0, 0); opacity: 0.3 !important; }


.CodeMirror { height: auto; }
.CodeMirror.cm-s-inner { background: inherit; }
.CodeMirror-scroll { overflow: auto hidden; z-index: 3; }
.CodeMirror-gutter-filler, .CodeMirror-scrollbar-filler { background-color: rgb(255, 255, 255); }
.CodeMirror-gutters { border-right: 1px solid rgb(221, 221, 221); background: inherit; white-space: nowrap; }
.CodeMirror-linenumber { padding: 0px 3px 0px 5px; text-align: right; color: rgb(153, 153, 153); }
.cm-s-inner .cm-keyword { color: rgb(119, 0, 136); }
.cm-s-inner .cm-atom, .cm-s-inner.cm-atom { color: rgb(34, 17, 153); }
.cm-s-inner .cm-number { color: rgb(17, 102, 68); }
.cm-s-inner .cm-def { color: rgb(0, 0, 255); }
.cm-s-inner .cm-variable { color: rgb(0, 0, 0); }
.cm-s-inner .cm-variable-2 { color: rgb(0, 85, 170); }
.cm-s-inner .cm-variable-3 { color: rgb(0, 136, 85); }
.cm-s-inner .cm-string { color: rgb(170, 17, 17); }
.cm-s-inner .cm-property { color: rgb(0, 0, 0); }
.cm-s-inner .cm-operator { color: rgb(152, 26, 26); }
.cm-s-inner .cm-comment, .cm-s-inner.cm-comment { color: rgb(170, 85, 0); }
.cm-s-inner .cm-string-2 { color: rgb(255, 85, 0); }
.cm-s-inner .cm-meta { color: rgb(85, 85, 85); }
.cm-s-inner .cm-qualifier { color: rgb(85, 85, 85); }
.cm-s-inner .cm-builtin { color: rgb(51, 0, 170); }
.cm-s-inner .cm-bracket { color: rgb(153, 153, 119); }
.cm-s-inner .cm-tag { color: rgb(17, 119, 0); }
.cm-s-inner .cm-attribute { color: rgb(0, 0, 204); }
.cm-s-inner .cm-header, .cm-s-inner.cm-header { color: rgb(0, 0, 255); }
.cm-s-inner .cm-quote, .cm-s-inner.cm-quote { color: rgb(0, 153, 0); }
.cm-s-inner .cm-hr, .cm-s-inner.cm-hr { color: rgb(153, 153, 153); }
.cm-s-inner .cm-link, .cm-s-inner.cm-link { color: rgb(0, 0, 204); }
.cm-negative { color: rgb(221, 68, 68); }
.cm-positive { color: rgb(34, 153, 34); }
.cm-header, .cm-strong { font-weight: 700; }
.cm-del { text-decoration: line-through; }
.cm-em { font-style: italic; }
.cm-link { text-decoration: underline; }
.cm-error { color: red; }
.cm-invalidchar { color: red; }
.cm-constant { color: rgb(38, 139, 210); }
.cm-defined { color: rgb(181, 137, 0); }
div.CodeMirror span.CodeMirror-matchingbracket { color: rgb(0, 255, 0); }
div.CodeMirror span.CodeMirror-nonmatchingbracket { color: rgb(255, 34, 34); }
.cm-s-inner .CodeMirror-activeline-background { background: inherit; }
.CodeMirror { position: relative; overflow: hidden; }
.CodeMirror-scroll { height: 100%; outline: 0px; position: relative; box-sizing: content-box; background: inherit; }
.CodeMirror-sizer { position: relative; }
.CodeMirror-gutter-filler, .CodeMirror-hscrollbar, .CodeMirror-scrollbar-filler, .CodeMirror-vscrollbar { position: absolute; z-index: 6; display: none; }
.CodeMirror-vscrollbar { right: 0px; top: 0px; overflow: hidden; }
.CodeMirror-hscrollbar { bottom: 0px; left: 0px; overflow: hidden; }
.CodeMirror-scrollbar-filler { right: 0px; bottom: 0px; }
.CodeMirror-gutter-filler { left: 0px; bottom: 0px; }
.CodeMirror-gutters { position: absolute; left: 0px; top: 0px; padding-bottom: 30px; z-index: 3; }
.CodeMirror-gutter { white-space: normal; height: 100%; box-sizing: content-box; padding-bottom: 30px; margin-bottom: -32px; display: inline-block; }
.CodeMirror-gutter-wrapper { position: absolute; z-index: 4; background: 0px 0px !important; border: none !important; }
.CodeMirror-gutter-background { position: absolute; top: 0px; bottom: 0px; z-index: 4; }
.CodeMirror-gutter-elt { position: absolute; cursor: default; z-index: 4; }
.CodeMirror-lines { cursor: text; }
.CodeMirror pre { border-radius: 0px; border-width: 0px; background: 0px 0px; font-family: inherit; font-size: inherit; margin: 0px; white-space: pre; overflow-wrap: normal; color: inherit; z-index: 2; position: relative; overflow: visible; }
.CodeMirror-wrap pre { overflow-wrap: break-word; white-space: pre-wrap; word-break: normal; }
.CodeMirror-code pre { border-right: 30px solid transparent; width: fit-content; }
.CodeMirror-wrap .CodeMirror-code pre { border-right: none; width: auto; }
.CodeMirror-linebackground { position: absolute; left: 0px; right: 0px; top: 0px; bottom: 0px; z-index: 0; }
.CodeMirror-linewidget { position: relative; z-index: 2; overflow: auto; }
.CodeMirror-wrap .CodeMirror-scroll { overflow-x: hidden; }
.CodeMirror-measure { position: absolute; width: 100%; height: 0px; overflow: hidden; visibility: hidden; }
.CodeMirror-measure pre { position: static; }
.CodeMirror div.CodeMirror-cursor { position: absolute; visibility: hidden; border-right: none; width: 0px; }
.CodeMirror div.CodeMirror-cursor { visibility: hidden; }
.CodeMirror-focused div.CodeMirror-cursor { visibility: inherit; }
.cm-searching { background: rgba(255, 255, 0, 0.4); }
@media print {
  .CodeMirror div.CodeMirror-cursor { visibility: hidden; }
}


:root {
    --side-bar-bg-color: #fafafa;
    --control-text-color: #777;
}

@include-when-export url(https://fonts.loli.net/css?family=Open+Sans:400italic,700italic,700,400&subset=latin,latin-ext);

/* open-sans-regular - latin-ext_latin */
  /* open-sans-italic - latin-ext_latin */
    /* open-sans-700 - latin-ext_latin */
    /* open-sans-700italic - latin-ext_latin */
  html {
    font-size: 16px;
}

body {
    font-family: "Open Sans","Clear Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: rgb(51, 51, 51);
    line-height: 1.6;
}

#write {
    max-width: 860px;
  	margin: 0 auto;
  	padding: 30px;
    padding-bottom: 100px;
}

@media only screen and (min-width: 1400px) {
	#write {
		max-width: 1024px;
	}
}

@media only screen and (min-width: 1800px) {
	#write {
		max-width: 1200px;
	}
}

#write > ul:first-child,
#write > ol:first-child{
    margin-top: 30px;
}

a {
    color: #4183C4;
}
h1,
h2,
h3,
h4,
h5,
h6 {
    position: relative;
    margin-top: 1rem;
    margin-bottom: 1rem;
    font-weight: bold;
    line-height: 1.4;
    cursor: text;
}
h1:hover a.anchor,
h2:hover a.anchor,
h3:hover a.anchor,
h4:hover a.anchor,
h5:hover a.anchor,
h6:hover a.anchor {
    text-decoration: none;
}
h1 tt,
h1 code {
    font-size: inherit;
}
h2 tt,
h2 code {
    font-size: inherit;
}
h3 tt,
h3 code {
    font-size: inherit;
}
h4 tt,
h4 code {
    font-size: inherit;
}
h5 tt,
h5 code {
    font-size: inherit;
}
h6 tt,
h6 code {
    font-size: inherit;
}
h1 {
    padding-bottom: .3em;
    font-size: 2.25em;
    line-height: 1.2;
    border-bottom: 1px solid #eee;
}
h2 {
   padding-bottom: .3em;
    font-size: 1.75em;
    line-height: 1.225;
    border-bottom: 1px solid #eee;
}
h3 {
    font-size: 1.5em;
    line-height: 1.43;
}
h4 {
    font-size: 1.25em;
}
h5 {
    font-size: 1em;
}
h6 {
   font-size: 1em;
    color: #777;
}
p,
blockquote,
ul,
ol,
dl,
table{
    margin: 0.8em 0;
}
li>ol,
li>ul {
    margin: 0 0;
}
hr {
    height: 2px;
    padding: 0;
    margin: 16px 0;
    background-color: #e7e7e7;
    border: 0 none;
    overflow: hidden;
    box-sizing: content-box;
}

li p.first {
    display: inline-block;
}
ul,
ol {
    padding-left: 30px;
}
ul:first-child,
ol:first-child {
    margin-top: 0;
}
ul:last-child,
ol:last-child {
    margin-bottom: 0;
}
blockquote {
    border-left: 4px solid #dfe2e5;
    padding: 0 15px;
    color: #777777;
}
blockquote blockquote {
    padding-right: 0;
}
table {
    padding: 0;
    word-break: initial;
}
table tr {
    border-top: 1px solid #dfe2e5;
    margin: 0;
    padding: 0;
}
table tr:nth-child(2n),
thead {
    background-color: #f8f8f8;
}
table tr th {
    font-weight: bold;
    border: 1px solid #dfe2e5;
    border-bottom: 0;
    margin: 0;
    padding: 6px 13px;
}
table tr td {
    border: 1px solid #dfe2e5;
    margin: 0;
    padding: 6px 13px;
}
table tr th:first-child,
table tr td:first-child {
    margin-top: 0;
}
table tr th:last-child,
table tr td:last-child {
    margin-bottom: 0;
}

.CodeMirror-lines {
    padding-left: 4px;
}

.code-tooltip {
    box-shadow: 0 1px 1px 0 rgba(0,28,36,.3);
    border-top: 1px solid #eef2f2;
}

.md-fences,
code,
tt {
    border: 1px solid #e7eaed;
    background-color: #f8f8f8;
    border-radius: 3px;
    padding: 0;
    padding: 2px 4px 0px 4px;
    font-size: 0.9em;
}

code {
    background-color: #f3f4f4;
    padding: 0 2px 0 2px;
}

.md-fences {
    margin-bottom: 15px;
    margin-top: 15px;
    padding-top: 8px;
    padding-bottom: 6px;
}


.md-task-list-item > input {
  margin-left: -1.3em;
}

@media print {
    html {
        font-size: 13px;
    }
    table,
    pre {
        page-break-inside: avoid;
    }
    pre {
        word-wrap: break-word;
    }
}

.md-fences {
	background-color: #f8f8f8;
}
#write pre.md-meta-block {
	padding: 1rem;
    font-size: 85%;
    line-height: 1.45;
    background-color: #f7f7f7;
    border: 0;
    border-radius: 3px;
    color: #777777;
    margin-top: 0 !important;
}

.mathjax-block>.code-tooltip {
	bottom: .375rem;
}

.md-mathjax-midline {
    background: #fafafa;
}

#write>h3.md-focus:before{
	left: -1.5625rem;
	top: .375rem;
}
#write>h4.md-focus:before{
	left: -1.5625rem;
	top: .285714286rem;
}
#write>h5.md-focus:before{
	left: -1.5625rem;
	top: .285714286rem;
}
#write>h6.md-focus:before{
	left: -1.5625rem;
	top: .285714286rem;
}
.md-image>.md-meta {
    /*border: 1px solid #ddd;*/
    border-radius: 3px;
    padding: 2px 0px 0px 4px;
    font-size: 0.9em;
    color: inherit;
}

.md-tag {
    color: #a7a7a7;
    opacity: 1;
}

.md-toc { 
    margin-top:20px;
    padding-bottom:20px;
}

.sidebar-tabs {
    border-bottom: none;
}

#typora-quick-open {
    border: 1px solid #ddd;
    background-color: #f8f8f8;
}

#typora-quick-open-item {
    background-color: #FAFAFA;
    border-color: #FEFEFE #e5e5e5 #e5e5e5 #eee;
    border-style: solid;
    border-width: 1px;
}

/** focus mode */
.on-focus-mode blockquote {
    border-left-color: rgba(85, 85, 85, 0.12);
}

header, .context-menu, .megamenu-content, footer{
    font-family: "Segoe UI", "Arial", sans-serif;
}

.file-node-content:hover .file-node-icon,
.file-node-content:hover .file-node-open-state{
    visibility: visible;
}

.mac-seamless-mode #typora-sidebar {
    background-color: #fafafa;
    background-color: var(--side-bar-bg-color);
}

.md-lang {
    color: #b4654d;
}

.html-for-mac .context-menu {
    --item-hover-bg-color: #E6F0FE;
}

#md-notification .btn {
    border: 0;
}

.dropdown-menu .divider {
    border-color: #e5e5e5;
}

.ty-preferences .window-content {
    background-color: #fafafa;
}

.ty-preferences .nav-group-item.active {
    color: white;
    background: #999;
}


</style>
</head>
<body class='typora-export os-windows' >
	<button id="mode-toggle" class="btn" >💡</button>
	<!--返回顶部-->
	<div class="home">
		<a href="../front.html" class="glyphicon glyphicon-menu-left"></a>
	</div>
	<button onclick="topFunction()" id="topButton" class="glyphicon glyphicon-menu-up"></button>
	<button onclick="showOrCloseCategory()" id="foldOrUnfold" class="glyphicon glyphicon-th-large"></button>
	
	<!--文章主体部分-->
	<div class="book-body" id="book_body"> </div>
	<!--目录栏-->
	<div class="book-summary" id="category" style="display:none"></div>
<div  id='write'  class = ''><h2><a name="前端学习路线" class="md-header-anchor"></a><span>前端学习路线。</span></h2><p><a href='https://link.zhihu.com/?target=https%3A//github.com/f2e-journey/f2e-journey/blob/master/career-planning.md'><span>前端工程师职业规划</span></a></p><hr /><p><span>更新微信公众号</span></p><blockquote><p><span>微信公众号：</span></p></blockquote><ul><li><p><span>腾讯AlloyTeam</span></p></li><li><p><span>印记中文</span></p></li><li><p><span>奇舞周刊</span></p></li><li><p><span>前端大全</span></p></li><li><p><span>前端外刊评论</span></p></li><li><p><span>前端早读课</span></p></li><li><p><span>前端之巅</span></p></li><li><p><span>凹凸实验室</span></p></li><li><p><span>Node地下铁</span></p></li><li><p><span>FEX</span></p></li><li><p><span>W3cplus</span></p></li><li><p><span>w3ctech</span></p></li><li><ul><li><span>*</span></li></ul></li></ul><p><a href='https://link.zhihu.com/?target=https%3A//github.com/qianguyihao/Web'><span>https://github.com/qianguyihao/Web</span></a></p><p><span>这是一个大佬总结的知识点，特别全且清晰，所以分享出来</span></p><p><img src="https://pic1.zhimg.com/v2-c032d1015f713d09a848774aeb12a0dc_r.jpg" referrerpolicy="no-referrer" alt="img"></p><hr /><blockquote><p><strong><span>书籍推荐：</span></strong><a href='https://link.zhihu.com/?target=https%3A//github.com/Hard-workingrookie/javasrcipt-design-pattern'><span>《JavaScript设计模式与开发实践》</span></a>
<span>《你不知道的JavaScript》、《CSS揭秘》《JavaScript忍者秘籍》、《JavaScript高级程序设计第四版》、《the road to learn react》《学习JavaScript数据结构与算法》</span></p><p><strong><span>知识图谱：➡️</span></strong><span> </span><a href='https://link.zhihu.com/?target=https%3A//f2e.tech/%3Fspm%3Da21iq3.home.0.0.33632764LDFLoU'><span>阿里巴巴知识图谱</span></a>
<strong><a href='https://link.zhihu.com/?target=https%3A//whjin.github.io/frontend-dev-doc/'><span>前端开发文档</span></a></strong></p></blockquote><p><img src="https://pic4.zhimg.com/v2-de8d216f6e18eb0e6502b3318d6aa0b3_r.jpg" referrerpolicy="no-referrer" alt="img"></p><h2><a name="一编辑器" class="md-header-anchor"></a><span>一、编辑器：</span></h2><ol><li><strong><span>VSCode (推荐使用)</span></strong></li></ol><p>&nbsp;</p><ol><li><span>WebStorm</span></li><li><span>Atom</span></li><li><span>Sublime</span></li></ol><hr /><p>&nbsp;</p><hr /><h2><a name="二html" class="md-header-anchor"></a><span>二、HTML</span></h2><ul><li><span>常用标签</span></li><li><span>表单</span></li><li><span>HTML</span></li></ul><p><a href='https://link.zhihu.com/?target=https%3A//www.runoob.com/html/html-tutorial.html'><span>HTML 教程 | 菜鸟教程</span></a></p><h2><a name="三css" class="md-header-anchor"></a><span>三、CSS</span></h2><ul><li><strong><span>基本语法</span></strong></li><li><strong><span>布局（</span></strong><span>浮动</span><code>float</code><span>、定位</span><code>position</code><span>、盒模型、</span><code>flex</code><span>、</span><code>grid/layout</code><strong><span>)</span></strong></li><li><strong><span>响应式布局</span></strong></li><li><span>viewport（用户网页的可视区域）</span></li></ul><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 8px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation"><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">&lt;meta name="viewport" content="width=device-width, initial-scale=1.0"&gt;</span></pre></div></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 23px;"></div><div class="CodeMirror-gutters" style="display: none; height: 23px;"></div></div></div></pre><ul><li><span>流动布局（fluid grid）</span></li><li><span>媒体监听</span><code>@media</code></li></ul><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 8px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">@media only screen and (max-width: 500px) {</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  .gridmenu {</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp; &nbsp; &nbsp; &nbsp; width:100%;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  } &nbsp;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">}</span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 115px;"></div><div class="CodeMirror-gutters" style="display: none; height: 115px;"></div></div></div></pre><ul><li><span>移动端适配</span></li></ul><p><a href='https://link.zhihu.com/?target=https%3A//www.runoob.com/css/css-tutorial.html'><span>CSS 教程 | 菜鸟教程</span></a></p><hr /><h2><a name="四js特别重要将时间多花点在js上" class="md-header-anchor"></a><span>四、JS(特别重要，将时间多花点在JS上)</span></h2><p><a href='https://link.zhihu.com/?target=https%3A//www.bilibili.com/video/BV1YW411T7GX%3Ffrom%3Dsearch%26seid%3D10104038366788666376'><span>尚硅谷JS 入门 视频 B站</span></a></p><ul><li><strong><span>基本语法</span></strong></li><li><strong><span>函数</span></strong></li></ul><ol><li><a href='https://link.zhihu.com/?target=https%3A//www.liaoxuefeng.com/wiki/1022910821149312/1023021087191360'><span>函数定义和调用</span></a></li><li><a href='https://link.zhihu.com/?target=https%3A//www.liaoxuefeng.com/wiki/1022910821149312/1023021187855808'><span>变量作用域与解构赋值</span></a></li><li><a href='https://link.zhihu.com/?target=https%3A//www.liaoxuefeng.com/wiki/1022910821149312/1023023754768768'><span>方法</span></a></li><li><a href='https://link.zhihu.com/?target=https%3A//www.liaoxuefeng.com/wiki/1022910821149312/1023021271742944'><span>高阶函数</span></a></li><li><a href='https://link.zhihu.com/?target=https%3A//www.liaoxuefeng.com/wiki/1022910821149312/1023021250770016'><span>闭包</span></a></li><li><a href='https://link.zhihu.com/?target=https%3A//www.liaoxuefeng.com/wiki/1022910821149312/1031549578462080'><span>箭头函数</span></a></li><li><a href='https://link.zhihu.com/?target=https%3A//www.liaoxuefeng.com/wiki/1022910821149312/1023024381818112'><span>generator</span></a></li></ol><ul><li><strong><span>标准对象</span></strong></li><li><strong><span>面向对象编程</span></strong></li></ul><ol><li><a href='https://link.zhihu.com/?target=https%3A//www.liaoxuefeng.com/wiki/1022910821149312/1023022043494624'><span>创建对象</span></a></li><li><a href='https://link.zhihu.com/?target=https%3A//www.liaoxuefeng.com/wiki/1022910821149312/1023021997355072'><span>原型继承</span></a></li><li><a href='https://link.zhihu.com/?target=https%3A//www.liaoxuefeng.com/wiki/1022910821149312/1072866346339712'><span>class继承</span></a></li></ol><ul><li><strong><span>ES6+</span></strong></li><li><strong><span>this、call、apply</span></strong></li><li><strong><span>异步（</span></strong><code>Ajax</code><strong><span>、</span></strong><code>promise</code><strong><span>、</span></strong><code>async/await</code><strong><span>）</span></strong></li><li><strong><span>设计模式（</span></strong><span>推荐看书</span><strong><span>《JavaScript设计模式与开发实践》）,</span></strong><span>将js都学完再来看设计模式</span></li></ul><p>&nbsp;</p><blockquote><p><span>目前很多公司都使用了Typescript，面试的时候大都会问你会不会ts,所以伙伴们也要学习起来了。</span></p></blockquote><p>&nbsp;</p><hr /><blockquote><p><span>在你学习完HTML+CSS+JS后，还没有学框架（react、vue、angular），但是又想练练手，做些小demo，此时有一个开源库会适合你：</span><strong><a href='https://link.zhihu.com/?target=https%3A//github.com/bradtraversy/50projects50days'><span>50个demo</span></a></strong><span> ，当然工作了或者学完框架后的小伙伴如果感觉基础没有学好，也可以回来练练这个。</span></p></blockquote><h2><a name="五版本管理工具git" class="md-header-anchor"></a><span>五、版本管理工具Git</span></h2><h2><a name="推荐使用软件towersourcetree" class="md-header-anchor"></a><span>推荐使用软件（Tower/sourcetree)</span></h2><p><img src="https://pic4.zhimg.com/v2-1a5a78ba5e4bcdbe5a0fff4089dc568f_r.jpg" referrerpolicy="no-referrer" alt="img"></p><p><img src="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='231' height='346'></svg" referrerpolicy="no-referrer" alt="img"></p><p><span>快捷方便，commit 、push、 pull、 checkout 、merge、 restore、 rename等等，一键搞定</span></p><p>&nbsp;</p><ul><li><span>工作流程</span></li></ul><p><img src="https://pic4.zhimg.com/v2-4da51a165e7fbeba06f782eed69dd94b_r.jpg" referrerpolicy="no-referrer" alt="img"></p><ul><li><strong><span>创建仓库</span></strong></li></ul><p><span>git init</span></p><ul><li><span>基</span><strong><span>本操作</span></strong></li></ul><ol><li><span>git clone</span></li><li><span>git add</span></li><li><span>git diff</span></li><li><span>git commit</span></li><li><span>git rm</span></li><li><span>git reset HEAD</span></li></ol><ul><li><strong><span>分支管理</span></strong></li></ul><ol><li><span>git branch (branchname)</span></li><li><span>git merge</span></li><li><span>git rebase (branchname)</span></li></ol><blockquote><p><span>这是本人记录的比较常用的一些指令</span></p></blockquote><p><a href='https://link.zhihu.com/?target=https%3A//www.yuque.com/u2417328/rlt5do/nmgh6x'><span>Git 指令 牢记 · 语雀</span></a></p><ul><li><strong><span>使用github搭建个人博客，可用以下</span></strong></li></ul><ol><li><span>hexo</span></li><li><span>gatsby</span></li><li><span>vuePress</span></li></ol><p>&nbsp;</p><blockquote><p><span>很多公司都实行Code Review， 排查问题，提高代码质量、统一风格，团队合作建议实施code review，可以多参考借鉴成熟并且有效的code review规范。</span></p></blockquote><hr /><h2><a name="六node不用学太深" class="md-header-anchor"></a><span>六、Node(不用学太深)</span></h2><p><strong><span>包管理</span></strong></p><ul><li><strong><span>npm （相当于手机里的应用商店，可以下载很多软件包）</span></strong></li></ul><ol><li><code>npm install &lt;package-name&gt;</code><span> (安装单个软件包)</span></li><li><code>npm update &lt;package-name&gt;</code><span> (更新软件包)</span></li><li><code>npm run &lt;task-name&gt;</code><span> (运行任务)</span></li><li><code>npm uninstall &lt;package-name&gt;(</code><span>卸载 npm 软件包)</span></li><li><code>-g</code><span>标志可以执行全局安装</span></li><li><code>-S</code><span>就是</span><code>--save</code><span>的简写</span></li><li><code>-D</code><span>就是</span><code>--save-dev</code><span> 这样安装的包的名称及版本号就会存在</span><code>package.json</code><span>的</span><code>devDependencies</code><span>这个里面，而--save会将包的名称及版本号放在</span><code>dependencies</code><span>里面。</span></li></ol><ul><li><strong><span>yarn</span></strong></li><li><strong><span>npx</span></strong></li></ul><p><span>常用包</span></p><ul><li><span>文件读写fs</span></li><li><span>路径查找path</span></li><li><span>网络http</span></li></ul><p>&nbsp;</p><hr /><blockquote><p><em><span>相关</span></em></p></blockquote><h3><a name="expressjs-nodejs-的优化版）" class="md-header-anchor"></a><span>express.js (node.js 的优化版）</span></h3><p>&nbsp;</p><p><strong><span>koa</span></strong><span> </span><strong><span>(基于node.js的web开发框架)</span></strong></p><p>&nbsp;</p><h2><a name="七构建工具" class="md-header-anchor"></a><span>七、构建工具</span></h2><h3><a name="自动化构建" class="md-header-anchor"></a><span>自动化构建</span></h3><ol><li><code>npm script</code></li></ol><p><span>npm 允许在 </span><code>package.json</code><span> 文件里面，使用 </span><code>scripts</code><span> 字段定义脚本命令</span></p><p><span>  </span></p><p><a href='https://link.zhihu.com/?target=http%3A//www.ruanyifeng.com/blog/2016/10/npm_scripts.html'><span>npm scripts 使用指南</span></a></p><blockquote><p><span>相关</span></p></blockquote><ul><li><strong><span>gulp</span></strong></li><li><strong><span>模块化打包</span></strong></li><li><strong><span>webpack(推荐)</span></strong></li></ul><p>&nbsp;</p><ul><li><strong><span>Vite (推荐)</span></strong></li></ul><p>&nbsp;</p><ul><li><strong><span>Rollup</span></strong></li><li><strong><span>Snowpack</span></strong></li><li><strong><span>Parcel</span></strong></li><li><strong><span>grunt</span></strong></li></ul><p>&nbsp;</p><hr /><h2><a name="八css预处理" class="md-header-anchor"></a><span>八、CSS预处理</span></h2><ul><li><span>Sass(推荐）</span></li></ul><p>&nbsp;</p><ul><li><span>PostCss</span></li><li><span>Stylus</span></li><li><span>Less</span></li></ul><p><span>转载</span></p><p><a href='https://link.zhihu.com/?target=https%3A//www.jianshu.com/p/9d84bb5043bb'><span>CSS 预处理器 sass,less,stylus优缺点</span></a></p><hr /><h2><a name="九js框架没有好与不好只有适不适合" class="md-header-anchor"></a><span>九、JS框架(没有好与不好，只有适不适合)</span></h2><ul><li><strong><span>React(推荐）</span></strong></li></ul><blockquote><p><strong><span>官方文档 一定一定 要仔细的 从头到尾 多看 几遍 ！！！！</span></strong></p></blockquote><p>&nbsp;</p><ol><li><a href='https://link.zhihu.com/?target=https%3A//redux.js.org/'><span>Redux</span></a><span>(</span><a href='https://link.zhihu.com/?target=https%3A//redux-toolkit-cn.netlify.app/introduction/quick-start/'><span>redux-toolkit</span></a><span>)</span></li><li><a href='https://link.zhihu.com/?target=https%3A//zh-hans.reactjs.org/docs/hooks-intro.html'><span>React Hooks</span></a></li><li><span>Mobx</span></li><li><span>React-router</span></li></ol><blockquote><p><span>想学习源码的</span>
<span>1.</span><a href='https://link.zhihu.com/?target=https%3A//react.iamkasong.com/'><span>React技术揭秘</span></a><span> 2. </span><a href='https://link.zhihu.com/?target=https%3A//bogdan-lyashenko.github.io/Under-the-hood-ReactJS/stack/languages/chinese/book/Intro.html'><span>Under-the-hood-ReactJS</span></a><span> 3. </span><a href='https://link.zhihu.com/?target=https%3A//pomb.us/build-your-own-react/'><span>Build your own React</span></a></p></blockquote><ul><li><strong><span>Vue（推荐）</span></strong></li></ul><p>&nbsp;</p><ol><li><span>Vuex</span></li><li><span>Vue-router</span></li></ol><blockquote><p><span>学习源码</span><a href='https://link.zhihu.com/?target=https%3A//vue-js.com/learn-vue/'><span>Vue源码系列-Vue中文社区</span></a></p></blockquote><ul><li><strong><span>Angular</span></strong></li></ul><ol><li><span>RxJS （异步优化）</span></li><li><span>NgRx</span></li></ol><hr /><h2><a name="十ui框架" class="md-header-anchor"></a><span>十、UI框架</span></h2><ul><li><strong><span>Antd(推荐)</span></strong></li></ul><p>&nbsp;</p><ul><li><strong><span>Element UI（推荐）</span></strong></li></ul><p>&nbsp;</p><ul><li><span>Material UI</span></li></ul><p>&nbsp;</p><ul><li><span>Bootstrap</span></li></ul><p>&nbsp;</p><ul><li><span>semantic UI</span></li></ul><p>&nbsp;</p><p><span>vant (移动端）</span></p><p>&nbsp;</p><p><span>Mobile UI</span></p><p>&nbsp;</p><p><span>目前 Vant 官方提供了</span><a href='https://link.zhihu.com/?target=https%3A//vant-contrib.gitee.io/vant'><span>Vue 版本</span></a><span>和</span><a href='https://link.zhihu.com/?target=http%3A//vant-contrib.gitee.io/vant-weapp'><span>微信小程序版本</span></a><span>，并由社区团队维护</span><a href='https://link.zhihu.com/?target=https%3A//github.com/mxdi9i7/vant-react'><span>React 版本</span></a><span>。</span></p><hr /><h2><a name="十一css优化方案" class="md-header-anchor"></a><span>十一、CSS优化方案</span></h2><ul><li><strong><span>Styled-Component(推荐)</span></strong></li></ul><p><a href='https://link.zhihu.com/?target=https%3A//styled-components.com/'><span>styled-components</span></a></p><pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang=""><div class="CodeMirror cm-s-inner CodeMirror-wrap" lang=""><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 0px; left: 8px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure"><pre><span>xxxxxxxxxx</span></pre></div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">import styled from 'styled-components';</span></pre></div><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">const Wrapper = styled.section`</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  margin: 0 auto;  width: 300px;  text-align: center;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">`;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">const Button = styled.button`</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  width: 100px;  color: white;  background: skyblue;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">`;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">render(</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;Wrapper&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"> &nbsp;  &lt;Button&gt;Hello World&lt;/Button&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">  &lt;/Wrapper&gt;</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;">);</span></pre><pre class=" CodeMirror-line " role="presentation"><span role="presentation" style="padding-right: 0.1px;"><span cm-text="">​</span></span></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 299px;"></div><div class="CodeMirror-gutters" style="display: none; height: 299px;"></div></div></div></pre><ul><li><strong><span>CSS Modules（推荐）</span></strong></li></ul><p><span>Styled JSX</span></p><ul><li><p><a href='https://link.zhihu.com/?target=https%3A//emotion.sh/docs/introduction'><span>emotion</span></a></p></li><li><p><a href='https://link.zhihu.com/?target=https%3A//glamorous.rocks/'><span>glamorous</span></a></p></li><li><ul><li><span>*</span></li></ul></li></ul><h2><a name="十二性能" class="md-header-anchor"></a><span>十二、性能</span></h2><p><span>白屏、卡顿、页面加载失败、页面跳转慢、图片空窗、崩溃、耗电等问题一直都是用户频繁舆情反馈的痛点。</span></p><ul><li><strong><span>性能指标</span></strong></li></ul><ol><li><span>白屏时间</span></li><li><span>首屏时间</span></li><li><span>用户可操作时间</span></li><li><span>页面总下载时间</span></li><li><span>请求数量</span></li></ol><ul><li><strong><span>RAIL模型</span></strong></li></ul><p>&nbsp;</p><ul><li><strong><span>LightHouse指标</span></strong></li></ul><p>&nbsp;</p><ul><li><strong><span>DevTools</span></strong></li><li><strong><span>PWA</span></strong></li></ul><p>&nbsp;</p><ul><li><strong><span>Service Worker</span></strong></li><li><strong><span>骨架屏</span></strong><span>（骨架屏(Skeleton Screen)是指在页面数据加载完成前，先给用户展示出页面的大致结构（灰色占位图），在拿到接口数据后渲染出实际页面内容然后替换掉。）</span></li></ul><p><img src="https://pic1.zhimg.com/v2-c5707217415ba67d2dbd7097bed28278_r.jpg" referrerpolicy="no-referrer" alt="img"></p><ul><li><strong><span>gzip</span></strong></li></ul><p>&nbsp;</p><p><a href='https://link.zhihu.com/?target=https%3A//segmentfault.com/a/1190000012571492'><span>前端性能优化之gzip_个人文章 - SegmentFault 思否</span></a></p><p>&nbsp;</p><ul><li><p><strong><span>懒加载和预加载</span></strong></p></li><li><p><strong><span>包分析工具（</span></strong><span>构建代码之后，明白到底是什么占用了那么多空间？可以使用 webpack-bundle-analyzer）</span></p></li><li><p><strong><span>防抖、节流</span></strong><span>（优化高频率执行js代码的一种手段，js中的一些事件如浏览器的</span><code>resize</code><span>、</span><code>scroll</code><span>，鼠标的</span><code>mousemove</code><span>、</span><code>mouseover</code><span>，</span><code>input</code><span>输入框的</span><code>keypress</code><span>等事件在触发时，会不断地调用绑定在事件上的回调函数，极大地浪费资源，降低前端性能。为了优化体验，需要对这类事件进行调用次数的限制。）</span></p></li><li><ul><li><span>*</span></li></ul></li></ul><h2><a name="十三数据可视化" class="md-header-anchor"></a><span>十三、数据可视化</span></h2><ul><li><strong><span>ECharts(推荐)</span></strong></li></ul><p><span>实例</span></p><p>&nbsp;</p><ul><li><strong><span>AntV</span></strong></li></ul><p>&nbsp;</p><ul><li><p><strong><span>HighChat</span></strong></p></li><li><p><strong><span>ucharts(小程序)</span></strong></p></li><li><ul><li><span>*</span></li></ul></li></ul><h2><a name="十四移动端应用android-studio--xcode）" class="md-header-anchor"></a><span>十四、移动端应用（Android Studio / XCode）</span></h2><ul><li><strong><span>React Native(推荐)</span></strong></li></ul><p>&nbsp;</p><blockquote><p><strong><span>*React Native 插件汇总：</span><span>*</span></strong></p></blockquote><ul><li><span>react-native-linear-gradient 颜色渐变处理</span></li><li><span>react-native-login 视频界面登录</span></li><li><span>react-native-keyboard-aware-scroll-view 键盘显示处理</span></li><li><span>react-native-popup-dialog 弹窗</span></li><li><span>react-native-dropdownalert 一种非常漂亮的alert弹窗方式，从状态栏往下弹窗；</span></li><li><span>react-native-simple-radio-button 单选按钮；</span></li><li><span>react-native-swiper</span></li><li><span>react-native-macos macos桌面应用</span></li><li><span>react-native-wechat 集成微信相关SDK</span></li><li><span>react-native-modalbox 模态弹窗</span></li><li><span>react-native-touch-id 指纹登录</span></li><li><span>react-native-prompt 可输入文字的弹窗</span></li><li><span>react-native-sqlite-storage sqlite数据库存储</span></li><li><span>react-native-permissions 权限检查</span></li><li><span>react-native-progress-hud loading圈</span></li><li><span>react-native-snackbar 类似toast的弹窗模式</span></li><li><span>react-native-qrcode-svg 二维码生产工具</span></li><li><span>native-base UI组件</span></li><li><span>react-native-busy-indicator loading圈</span></li><li><span>react-native-fit-image 图片展示优化</span></li><li><span>react-native-timer 定时器管理</span></li><li><span>react-native-scrollable-tab-view 可以左右滑动的tab</span></li><li><span>react-native-zip-archive 解压工具</span></li><li><span>react-native-xml2js</span></li><li><span>react-native-spinkit 好看的loading圈</span></li><li><span>react-native-interactable 有很强交互效果的table视图</span></li><li><span>react-native-pull-to-refresh 下拉刷新效果</span></li><li><span>react-native-deck-swiper 不错的swiper效果</span></li><li><span>react-native-prefix-picker select效果</span></li><li><span>react-native-gesture-helper 手势 向上还是向下 还是向左</span></li><li><span>react-native-drawer-layout 抽屉效果</span></li><li><span>react-native-sortable-listview 可拖拽排序的列表视图</span></li><li><span>react-native-progress 进度条 长方形 圆形</span></li><li><span>react-native-splash-screen 启动屏处理</span></li><li><span>react-native-masked-text 指定格式的输入框</span></li><li><span>react-native-keyboard-manager 针对IOS 键盘遮挡的问题 俺可以这么用android:windowSoftInputMode=&quot;adjustResize&quot;</span></li><li><span>react-native-beacons-manager 蓝牙处理</span></li><li><span>react-native-fetch-blob 文件获取</span></li><li><span>react-native-popup-menu 弹出菜单</span></li><li><span>react-native-pathjs-charts 图表</span></li><li><span>react-native-dates 日历日期选择工具</span></li><li><span>react-native-calendar-strip 一种简单的日历处理</span></li><li><span>react-native-simple-markdown 简单的markdown文本编辑器</span></li><li><span>react-native-image-progress 进度条</span></li><li><span>react-native-img-cache 图片缓存技术</span></li><li><span>rn-placeholder 在展示具体的文字和图片之前有个加载样式处理</span></li><li><span>react-native-pie-chart 饼状图</span></li><li><span>react-native-maps 地图</span></li><li><span>react-native-loading-overlay loading圈加载遮罩</span></li><li><span>react-native-progress 圆形进度条 </span><a href='https://link.zhihu.com/?target=https%3A//www.jianshu.com/p/d0742d421b7c'><span>react-native 圆形进度条</span></a></li><li><span>react-native-modal 弹窗插件 </span><a href='https://link.zhihu.com/?target=https%3A//www.npmjs.com/package/react-native-modal'><span>react-native-modal</span></a></li><li><span>react-native-extra-dimensions-android 安卓水滴屏获取屏幕高度 </span><a href='https://link.zhihu.com/?target=https%3A//github.com/Sunhat/react-native-extra-dimensions-android'><span>Sunhat/react-native-extra-dimensions-android</span></a></li></ul><p><span>  </span></p><ul><li><strong><span>Weex(</span></strong><span>阿里巴巴旗下的跨平台移动开发解决方案</span><strong><span>)</span></strong></li></ul><p>&nbsp;</p><ul><li><strong><span>Flutter</span></strong></li></ul><p>&nbsp;</p><hr /><h2><a name="十五小程序" class="md-header-anchor"></a><span>十五、小程序</span></h2><h3><a name="原生" class="md-header-anchor"></a><span>原生</span></h3><p><span>1) 微信</span></p><p>&nbsp;</p><p><span>2)支付宝</span></p><p>&nbsp;</p><p><span>3)头条</span></p><h3><a name="跨端" class="md-header-anchor"></a><span>跨端</span></h3><ul><li><strong><span>Taro</span></strong></li></ul><p>&nbsp;</p><blockquote><p><em><span>基于 Taro 框架开发的多端 UI 组件库:</span></em></p></blockquote><p>&nbsp;</p><ul><li><strong><span>uni-app</span></strong></li></ul><p>&nbsp;</p><blockquote><p><span>扩展组件市场：</span></p></blockquote><p>&nbsp;</p><h2><a name="十六桌面开发" class="md-header-anchor"></a><span>十六：桌面开发</span></h2><p><strong><span>Electron （推荐）</span></strong></p><p>&nbsp;</p><h2><a name="十七扩展学习" class="md-header-anchor"></a><strong><span>十七：扩展学习</span></strong></h2><ul><li><span>rxjs</span></li></ul><p>&nbsp;</p><ul><li><span>JavaScript Promise迷你书:</span></li></ul><p><a href='https://link.zhihu.com/?target=http%3A//liubin.org/promises-book/'><span>JavaScript Promise迷你书（中文版）</span></a></p><ul><li><span>正则表达式：</span></li></ul><p>&nbsp;</p><hr /><h2><a name="十八代码检查" class="md-header-anchor"></a><span>十八、代码检查</span></h2><blockquote><p><strong><span>解决代码质量问题！</span></strong></p></blockquote><p><span>eslint(</span><a href='https://link.zhihu.com/?target=https%3A//www.zoo.team/article/eslint-rules'><span>自定义 ESLint 规则，让代码持续美丽</span></a><span>)</span></p><p>&nbsp;</p><p><span>stylelint:</span></p><p>&nbsp;</p><p><a href='https://link.zhihu.com/?target=https%3A//stylelint.docschina.org/'><span>stylelint</span></a></p><p>&nbsp;</p><p><span>  </span></p><hr /><h2><a name="十九调试工具" class="md-header-anchor"></a><span>十九、调试工具</span></h2><h3><a name="jesthttpslinkzhihucomtargethttps3ajestjsio" class="md-header-anchor"></a><a href='https://link.zhihu.com/?target=https%3A//jestjs.io/'><span>jest</span></a></h3><h3><a name="mochahttpslinkzhihucomtargethttps3amochajsorg" class="md-header-anchor"></a><a href='https://link.zhihu.com/?target=https%3A//mochajs.org/'><span>Mocha</span></a></h3><h2><a name="二十前端周刊" class="md-header-anchor"></a><span>二十：前端周刊</span></h2><p>&nbsp;</p><p><a href='https://link.zhihu.com/?target=https%3A//weekly.75.team/'><span>奇舞周刊</span></a></p><p>&nbsp;</p><p><span>早早鸟</span></p><p>&nbsp;</p><h2><a name="二十一可以逛逛我收集的好用网站" class="md-header-anchor"></a><span>二十一：可以逛逛，我收集的好用网站</span></h2><p>&nbsp;</p><blockquote><p><span>建议勤记笔记，多复习，多积累，温故而知新。</span></p></blockquote><p><span>  </span></p><p><img src="https://pic3.zhimg.com/v2-60c10c0b365a776a3cc4a808a2401b8e_r.jpg" referrerpolicy="no-referrer" alt="img"></p></div>
</body>
<script src="./js/jquery.min.js"></script>
<script src="./js/highlight.min.js"></script>
<script src="js/index.js"></script>
</html>